package leetcode.sword;

import java.util.ArrayList;
import java.util.Collections;
import java.util.concurrent.locks.AbstractQueuedSynchronizer;
import java.util.concurrent.locks.ReentrantReadWriteLock;

public class Solution05 {
    public String replaceSpace(String s) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);
            if(c==' ') sb.append("%20");
            else sb.append(c);
        }
//        ReentrantReadWriteLock
//        AbstractQueuedSynchronizer
        return sb.toString();
    }
}
